| 摘要 |
PURPOSE:To increase a feed pressure when an engine is operated at a low and middle speed and in a high load area, reduce exhaust gas density through improvement of combustion performance, and to increase an output. CONSTITUTION:In an engine having a supercharger consisting of a low pressure stage supercharger and a high pressure stage supercharger, the scroll of the turbine 13 of a high pressure stage supercharger H forms a twine scroll type wherein exhaust gas of an engine cylinder is divided into two groups. The low pressure stage supercharger is provided with two superchargers having different capacity which are juxtaposed with each other. Switching into a case wherein a low supercharger L is operated, a case wherein a high capacity supercharger M is operated, and a case wherein the low and high capacity superchargers L and M are simultaneously operated is practicable by means of the output of the engine. |
